Prison gangster's lover missing

Police hold grave concerns for the girlfriend of a notorious prison gangster in Queensland who has disappeared.

Tia Maria Jayne Landers, 28, was last seen on June 16, when CCTV cameras recorded her walking into a petrol station on a motorway at Nudgee in Brisbane's north, The Courier-Mail reports.

A month earlier she failed to appear in court as her boyfriend Wade Bartz's co-accused in a violent home invasion.

Bartz is a member of the jailhouse Angry Gang and his previous claims to infamy include a high-profile jailbreak using bolt cutters and widely publicised affairs with both his prison psychiatrist and a guard, The Courier-Mail reports.

Ms Landers has children with Bartz from a long-term relationship, and her disappearance is believed to be unrelated to him.

The mother-of-four has schizophrenia and takes antipsychotic medication.